access.c
上传用户:riyaled888
上传日期:2009-03-27
资源大小:7338k
文件大小:21k
- /*****************************************************************************
- * access.c: DVB card input v4l2 only
- *****************************************************************************
- * Copyright (C) 1998-2004 VideoLAN
- *
- * Authors: Johan Bilien <jobi@via.ecp.fr>
- * Jean-Paul Saman <jpsaman@wxs.nl>
- * Christophe Massiot <massiot@via.ecp.fr>
- * Laurent Aimar <fenrir@via.ecp.fr>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
- *****************************************************************************/
- /*****************************************************************************
- * Preamble
- *****************************************************************************/
- #include <vlc/vlc.h>
- #include <vlc/input.h>
- #ifdef HAVE_UNISTD_H
- # include <unistd.h>
- #endif
- #include <fcntl.h>
- #include <sys/types.h>
- #include <errno.h>
- #include "dvb.h"
- /*****************************************************************************
- * Module descriptor
- *****************************************************************************/
- static int Open( vlc_object_t *p_this );
- static void Close( vlc_object_t *p_this );
- #define CACHING_TEXT N_("Caching value in ms")
- #define CACHING_LONGTEXT N_(
- "Allows you to modify the default caching value for dvb streams. This "
- "value should be set in millisecond units." )
- #define ADAPTER_TEXT N_("Adapter card to tune")
- #define ADAPTER_LONGTEXT N_("Adapter cards have a device file in directory named /dev/dvb/adapter[n] with n>=0.")
- #define DEVICE_TEXT N_("Device number to use on adapter")
- #define DEVICE_LONGTEXT ""
- #define FREQ_TEXT N_("Transponder/multiplex frequency")
- #define FREQ_LONGTEXT N_("In kHz for DVB-S or Hz for DVB-C/T")
- #define INVERSION_TEXT N_("Inversion mode")
- #define INVERSION_LONGTEXT N_("Inversion mode [0=off, 1=on, 2=auto]")
- #define PROBE_TEXT N_("Probe DVB card for capabilities")
- #define PROBE_LONGTEXT N_("Some DVB cards do not like to be probed for their capabilities.")
- #define LNB_LOF1_TEXT N_("Antenna lnb_lof1 (kHz)")
- #define LNB_LOF1_LONGTEXT ""
- #define LNB_LOF2_TEXT N_("Antenna lnb_lof2 (kHz)")
- #define LNB_LOF2_LONGTEXT ""
- #define LNB_SLOF_TEXT N_("Antenna lnb_slof (kHz)")
- #define LNB_SLOF_LONGTEXT ""
- /* Satellite */
- #define BUDGET_TEXT N_("Budget mode")
- #define BUDGET_LONGTEXT N_("This allows you to stream an entire transponder with a budget card.")
- #define SATNO_TEXT N_("Satellite number in the Diseqc system")
- #define SATNO_LONGTEXT N_("[0=no diseqc, 1-4=normal diseqc, -1=A, -2=B simple diseqc]")
- #define VOLTAGE_TEXT N_("LNB voltage")
- #define VOLTAGE_LONGTEXT N_("In Volts [0, 13=vertical, 18=horizontal]")
- #define TONE_TEXT N_("22 kHz tone")
- #define TONE_LONGTEXT N_("[0=off, 1=on, -1=auto]")
- #define FEC_TEXT N_("Transponder FEC")
- #define FEC_LONGTEXT N_("FEC=Forward Error Correction mode [9=auto]")
- #define SRATE_TEXT N_("Transponder symbol rate in kHz")
- #define SRATE_LONGTEXT ""
- /* Cable */
- #define MODULATION_TEXT N_("Modulation type")
- #define MODULATION_LONGTEXT N_("Modulation type for front-end device.")
- /* Terrestrial */
- #define CODE_RATE_HP_TEXT N_("Terrestrial high priority stream code rate (FEC)")
- #define CODE_RATE_HP_LONGTEXT ""
- #define CODE_RATE_LP_TEXT N_("Terrestrial low priority stream code rate (FEC)")
- #define CODE_RATE_LP_LONGTEXT ""
- #define BANDWIDTH_TEXT N_("Terrestrial bandwidth")
- #define BANDWIDTH_LONGTEXT N_("Terrestrial bandwidth [0=auto,6,7,8 in MHz]")
- #define GUARD_TEXT N_("Terrestrial guard interval")
- #define GUARD_LONGTEXT ""
- #define TRANSMISSION_TEXT N_("Terrestrial transmission mode")
- #define TRANSMISSION_LONGTEXT ""
- #define HIERARCHY_TEXT N_("Terrestrial hierarchy mode")
- #define HIERARCHY_LONGTEXT ""
- vlc_module_begin();
- set_shortname( _("DVB") );
- set_description( N_("DVB input with v4l2 support") );
- add_integer( "dvb-caching", DEFAULT_PTS_DELAY / 1000, NULL, CACHING_TEXT,
- CACHING_LONGTEXT, VLC_TRUE );
- add_integer( "dvb-adapter", 0, NULL, ADAPTER_TEXT, ADAPTER_LONGTEXT,
- VLC_FALSE );
- add_integer( "dvb-device", 0, NULL, DEVICE_TEXT, DEVICE_LONGTEXT,
- VLC_TRUE );
- add_integer( "dvb-frequency", 11954000, NULL, FREQ_TEXT, FREQ_LONGTEXT,
- VLC_FALSE );
- add_integer( "dvb-inversion", 2, NULL, INVERSION_TEXT, INVERSION_LONGTEXT,
- VLC_TRUE );
- add_bool( "dvb-probe", 1, NULL, PROBE_TEXT, PROBE_LONGTEXT, VLC_TRUE );
- add_integer( "dvb-lnb-lof1", 9750000, NULL, LNB_LOF1_TEXT,
- LNB_LOF1_LONGTEXT, VLC_TRUE );
- add_integer( "dvb-lnb-lof2", 10600000, NULL, LNB_LOF2_TEXT,
- LNB_LOF2_LONGTEXT, VLC_TRUE );
- add_integer( "dvb-lnb-slof", 11700000, NULL, LNB_SLOF_TEXT,
- LNB_SLOF_LONGTEXT, VLC_TRUE );
- /* DVB-S (satellite) */
- add_bool( "dvb-budget-mode", 0, NULL, BUDGET_TEXT, BUDGET_LONGTEXT,
- VLC_TRUE );
- add_integer( "dvb-satno", 0, NULL, SATNO_TEXT, SATNO_LONGTEXT,
- VLC_TRUE );
- add_integer( "dvb-voltage", 13, NULL, VOLTAGE_TEXT, VOLTAGE_LONGTEXT,
- VLC_TRUE );
- add_integer( "dvb-tone", -1, NULL, TONE_TEXT, TONE_LONGTEXT,
- VLC_TRUE );
- add_integer( "dvb-fec", 9, NULL, FEC_TEXT, FEC_LONGTEXT, VLC_TRUE );
- add_integer( "dvb-srate", 27500000, NULL, SRATE_TEXT, SRATE_LONGTEXT,
- VLC_FALSE );
- /* DVB-T (terrestrial) */
- add_integer( "dvb-modulation", 0, NULL, MODULATION_TEXT,
- MODULATION_LONGTEXT, VLC_TRUE );
- /* DVB-T (terrestrial) */
- add_integer( "dvb-code-rate-hp", 9, NULL, CODE_RATE_HP_TEXT,
- CODE_RATE_HP_LONGTEXT, VLC_TRUE );
- add_integer( "dvb-code-rate-lp", 9, NULL, CODE_RATE_LP_TEXT,
- CODE_RATE_LP_LONGTEXT, VLC_TRUE );
- add_integer( "dvb-bandwidth", 0, NULL, BANDWIDTH_TEXT, BANDWIDTH_LONGTEXT,
- VLC_TRUE );
- add_integer( "dvb-guard", 0, NULL, GUARD_TEXT, GUARD_LONGTEXT, VLC_TRUE );
- add_integer( "dvb-transmission", 0, NULL, TRANSMISSION_TEXT,
- TRANSMISSION_LONGTEXT, VLC_TRUE );
- add_integer( "dvb-hierarchy", 0, NULL, HIERARCHY_TEXT, HIERARCHY_LONGTEXT,
- VLC_TRUE );
- set_capability( "access2", 0 );
- add_shortcut( "dvb" );
- add_shortcut( "dvb-s" );
- add_shortcut( "qpsk" );
- add_shortcut( "dvb-c" );
- add_shortcut( "cable" );
- add_shortcut( "dvb-t" );
- add_shortcut( "terrestrial" );
- add_shortcut( "satellite" ); /* compatibility with the interface. */
- set_callbacks( Open, Close );
- vlc_module_end();
- /*****************************************************************************
- * Local prototypes
- *****************************************************************************/
- static block_t *Block( access_t * );
- static int Control( access_t *, int, va_list );
- #define DVB_READ_ONCE 3
- #define TS_PACKET_SIZE 188
- static void FilterUnset( access_t *, int i_max );
- static void FilterUnsetPID( access_t *, int i_pid );
- static void FilterSet( access_t *, int i_pid, int i_type );
- static void VarInit( access_t * );
- static int ParseMRL( access_t * );
- /*****************************************************************************
- * Open: open the frontend device
- *****************************************************************************/
- static int Open( vlc_object_t *p_this )
- {
- access_t *p_access = (access_t*)p_this;
- access_sys_t *p_sys;
- /* Only if selected */
- if( *p_access->psz_access == ' ' )
- return VLC_EGENERIC;
- /* Set up access */
- p_access->pf_read = NULL;
- p_access->pf_block = Block;
- p_access->pf_control = Control;
- p_access->pf_seek = NULL;
- p_access->info.i_update = 0;
- p_access->info.i_size = 0;
- p_access->info.i_pos = 0;
- p_access->info.b_eof = VLC_FALSE;
- p_access->info.i_title = 0;
- p_access->info.i_seekpoint = 0;
- p_access->p_sys = p_sys = malloc( sizeof( access_sys_t ) );
- memset( p_sys, 0, sizeof( access_sys_t ) );
- /* Create all variables */
- VarInit( p_access );
- /* Parse the command line */
- if( ParseMRL( p_access ) )
- {
- free( p_sys );
- return VLC_EGENERIC;
- }
- /* Getting frontend info */
- if( E_(FrontendOpen)( p_access) )
- {
- free( p_sys );
- return VLC_EGENERIC;
- }
- /* Setting frontend parameters for tuning the hardware */
- msg_Dbg( p_access, "trying to tune the frontend...");
- if( E_(FrontendSet)( p_access ) < 0 )
- {
- E_(FrontendClose)( p_access );
- free( p_sys );
- return VLC_EGENERIC;
- }
- /* Opening DVR device */
- if( E_(DVROpen)( p_access ) < 0 )
- {
- E_(FrontendClose)( p_access );
- free( p_sys );
- return VLC_EGENERIC;
- }
- p_sys->b_budget_mode = var_GetBool( p_access, "dvb-budget-mode" );
- if( p_sys->b_budget_mode )
- {
- msg_Dbg( p_access, "setting filter on all PIDs" );
- FilterSet( p_access, 0x2000, OTHER_TYPE );
- }
- else
- {
- msg_Dbg( p_access, "setting filter on PAT" );
- FilterSet( p_access, 0x0, OTHER_TYPE );
- }
- E_(CAMOpen)( p_access );
- return VLC_SUCCESS;
- }
- /*****************************************************************************
- * Close : Close the device
- *****************************************************************************/
- static void Close( vlc_object_t *p_this )
- {
- access_t *p_access = (access_t*)p_this;
- access_sys_t *p_sys = p_access->p_sys;
- FilterUnset( p_access, p_sys->b_budget_mode ? 1 : MAX_DEMUX );
- E_(DVRClose)( p_access );
- E_(FrontendClose)( p_access );
- E_(CAMClose)( p_access );
- free( p_sys );
- }
- /*****************************************************************************
- * Block:
- *****************************************************************************/
- static block_t *Block( access_t *p_access )
- {
- access_sys_t *p_sys = p_access->p_sys;
- block_t *p_block;
- for ( ; ; )
- {
- struct timeval timeout;
- fd_set fds;
- int i_ret;
- /* Initialize file descriptor set */
- FD_ZERO( &fds );
- FD_SET( p_sys->i_handle, &fds );
- /* We'll wait 0.5 second if nothing happens */
- timeout.tv_sec = 0;
- timeout.tv_usec = 500000;
- /* Find if some data is available */
- i_ret = select( p_sys->i_handle + 1, &fds, NULL, NULL, &timeout );
- if ( p_access->b_die )
- return NULL;
- if ( i_ret < 0 && errno == EINTR )
- continue;
- if ( i_ret < 0 )
- {
- msg_Err( p_access, "select error (%s)", strerror(errno) );
- return NULL;
- }
- if ( p_sys->i_ca_handle && mdate() > p_sys->i_ca_next_event )
- {
- E_(CAMPoll)( p_access );
- p_sys->i_ca_next_event = mdate() + p_sys->i_ca_timeout;
- }
- if ( FD_ISSET( p_sys->i_handle, &fds ) )
- {
- break;
- }
- }
- p_block = block_New( p_access, DVB_READ_ONCE * TS_PACKET_SIZE );
- if( ( p_block->i_buffer = read( p_sys->i_handle, p_block->p_buffer,
- DVB_READ_ONCE * TS_PACKET_SIZE ) ) <= 0 )
- {
- msg_Err( p_access, "read failed (%s)", strerror(errno) );
- block_Release( p_block );
- return NULL;
- }
- return p_block;
- }
- /*****************************************************************************
- * Control:
- *****************************************************************************/
- static int Control( access_t *p_access, int i_query, va_list args )
- {
- access_sys_t *p_sys = p_access->p_sys;
- vlc_bool_t *pb_bool, b_bool;
- int *pi_int, i_int;
- int64_t *pi_64;
- switch( i_query )
- {
- /* */
- case ACCESS_CAN_SEEK:
- case ACCESS_CAN_FASTSEEK:
- case ACCESS_CAN_PAUSE:
- case ACCESS_CAN_CONTROL_PACE:
- pb_bool = (vlc_bool_t*)va_arg( args, vlc_bool_t* );
- *pb_bool = VLC_FALSE;
- break;
- /* */
- case ACCESS_GET_MTU:
- pi_int = (int*)va_arg( args, int * );
- *pi_int = DVB_READ_ONCE * TS_PACKET_SIZE;
- break;
- case ACCESS_GET_PTS_DELAY:
- pi_64 = (int64_t*)va_arg( args, int64_t * );
- *pi_64 = var_GetInteger( p_access, "dvb-caching" ) * 1000;
- break;
- /* */
- case ACCESS_SET_PAUSE_STATE:
- case ACCESS_GET_TITLE_INFO:
- case ACCESS_SET_TITLE:
- case ACCESS_SET_SEEKPOINT:
- return VLC_EGENERIC;
- case ACCESS_SET_PRIVATE_ID_STATE:
- i_int = (int)va_arg( args, int ); /* Private data (pid for now)*/
- b_bool = (vlc_bool_t)va_arg( args, vlc_bool_t ); /* b_selected */
- if( !p_sys->b_budget_mode )
- {
- /* FIXME we may want to give the real type (me ?, I don't ;) */
- if( b_bool )
- FilterSet( p_access, i_int, OTHER_TYPE );
- else
- FilterUnsetPID( p_access, i_int );
- }
- break;
- case ACCESS_SET_PRIVATE_ID_CA:
- {
- uint8_t **pp_capmts;
- int i_nb_capmts;
- pp_capmts = (uint8_t **)va_arg( args, uint8_t ** );
- i_nb_capmts = (int)va_arg( args, int );
- E_(CAMSet)( p_access, pp_capmts, i_nb_capmts );
- break;
- }
- default:
- msg_Warn( p_access, "unimplemented query in control" );
- return VLC_EGENERIC;
- }
- return VLC_SUCCESS;
- }
- /*****************************************************************************
- * FilterSet/FilterUnset:
- *****************************************************************************/
- static void FilterSet( access_t *p_access, int i_pid, int i_type )
- {
- access_sys_t *p_sys = p_access->p_sys;
- int i;
- /* Find first free slot */
- for( i = 0; i < MAX_DEMUX; i++ )
- {
- if( !p_sys->p_demux_handles[i].i_type )
- break;
- if( p_sys->p_demux_handles[i].i_pid == i_pid )
- return; /* Already set */
- }
- if( i >= MAX_DEMUX )
- {
- msg_Err( p_access, "no free p_demux_handles !" );
- return;
- }
- if( E_(DMXSetFilter)( p_access, i_pid,
- &p_sys->p_demux_handles[i].i_handle, i_type ) )
- {
- msg_Err( p_access, "DMXSetFilter failed" );
- return;
- }
- p_sys->p_demux_handles[i].i_type = i_type;
- p_sys->p_demux_handles[i].i_pid = i_pid;
- }
- static void FilterUnset( access_t *p_access, int i_max )
- {
- access_sys_t *p_sys = p_access->p_sys;
- int i;
- for( i = 0; i < i_max; i++ )
- {
- if( p_sys->p_demux_handles[i].i_type )
- {
- E_(DMXUnsetFilter)( p_access, p_sys->p_demux_handles[i].i_handle );
- p_sys->p_demux_handles[i].i_type = 0;
- }
- }
- }
- static void FilterUnsetPID( access_t *p_access, int i_pid )
- {
- access_sys_t *p_sys = p_access->p_sys;
- int i;
- for( i = 0; i < MAX_DEMUX; i++ )
- {
- if( p_sys->p_demux_handles[i].i_type &&
- p_sys->p_demux_handles[i].i_pid == i_pid )
- {
- E_(DMXUnsetFilter)( p_access, p_sys->p_demux_handles[i].i_handle );
- p_sys->p_demux_handles[i].i_type = 0;
- }
- }
- }
- /*****************************************************************************
- * VarInit/ParseMRL:
- *****************************************************************************/
- static void VarInit( access_t *p_access )
- {
- /* */
- var_Create( p_access, "dvb-caching", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
- /* */
- var_Create( p_access, "dvb-adapter", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
- var_Create( p_access, "dvb-device", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
- var_Create( p_access, "dvb-frequency", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
- var_Create( p_access, "dvb-inversion", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
- var_Create( p_access, "dvb-probe", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
- var_Create( p_access, "dvb-lnb-lof1", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
- var_Create( p_access, "dvb-lnb-lof2", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
- var_Create( p_access, "dvb-lnb-slof", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
- /* */
- var_Create( p_access, "dvb-budget-mode", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
- var_Create( p_access, "dvb-satno", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
- var_Create( p_access, "dvb-voltage", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
- var_Create( p_access, "dvb-tone", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
- var_Create( p_access, "dvb-fec", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
- var_Create( p_access, "dvb-srate", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
- /* */
- var_Create( p_access, "dvb-modulation", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
- /* */
- var_Create( p_access, "dvb-code-rate-hp", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
- var_Create( p_access, "dvb-code-rate-lp", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
- var_Create( p_access, "dvb-bandwidth", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
- var_Create( p_access, "dvb-transmission", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
- var_Create( p_access, "dvb-guard", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
- var_Create( p_access, "dvb-hierarchy", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
- }
- /* */
- static int ParseMRL( access_t *p_access )
- {
- char *psz_dup = strdup( p_access->psz_path );
- char *psz_parser = psz_dup;
- char *psz_next;
- vlc_value_t val;
- #define GET_OPTION_INT( option )
- if ( !strncmp( psz_parser, option "=", strlen(option "=") ) )
- {
- val.i_int = strtol( psz_parser + strlen(option "="), &psz_parser,
- 0 );
- var_Set( p_access, "dvb-" option, val );
- }
- #define GET_OPTION_BOOL( option )
- if ( !strncmp( psz_parser, option "=", strlen(option "=") ) )
- {
- val.b_bool = strtol( psz_parser + strlen(option "="), &psz_parser,
- 0 );
- var_Set( p_access, "dvb-" option, val );
- }
- /* Test for old syntax */
- strtol( psz_parser, &psz_next, 10 );
- if( psz_next != psz_parser )
- {
- msg_Err( p_access, "the DVB input old syntax is deprecated, use vlc "
- "-p dvb to see an explanation of the new syntax" );
- free( psz_dup );
- return VLC_EGENERIC;
- }
- while( *psz_parser )
- {
- GET_OPTION_INT("adapter")
- else GET_OPTION_INT("device")
- else GET_OPTION_INT("frequency")
- else GET_OPTION_INT("inversion")
- else GET_OPTION_BOOL("probe")
- else GET_OPTION_INT("lnb-lof1")
- else GET_OPTION_INT("lnb-lof2")
- else GET_OPTION_INT("lnb-slof")
- else GET_OPTION_BOOL("budget-mode")
- else GET_OPTION_INT("voltage")
- else GET_OPTION_INT("tone")
- else GET_OPTION_INT("fec")
- else GET_OPTION_INT("srate")
- else GET_OPTION_INT("modulation")
- else GET_OPTION_INT("code-rate-hp")
- else GET_OPTION_INT("code-rate-lp")
- else GET_OPTION_INT("bandwidth")
- else GET_OPTION_INT("transmission")
- else GET_OPTION_INT("guard")
- else GET_OPTION_INT("hierarchy")
- else if( !strncmp( psz_parser, "satno=",
- strlen( "satno=" ) ) )
- {
- psz_parser += strlen( "satno=" );
- if ( *psz_parser == 'A' || *psz_parser == 'a' )
- val.i_int = -1;
- else if ( *psz_parser == 'B' || *psz_parser == 'b' )
- val.i_int = -2;
- else
- val.i_int = strtol( psz_parser, &psz_parser, 0 );
- var_Set( p_access, "dvb-satno", val );
- }
- /* Redundant with voltage but much easier to use */
- else if( !strncmp( psz_parser, "polarization=",
- strlen( "polarization=" ) ) )
- {
- psz_parser += strlen( "polarization=" );
- if ( *psz_parser == 'V' || *psz_parser == 'v' )
- val.i_int = 13;
- else if ( *psz_parser == 'H' || *psz_parser == 'h' )
- val.i_int = 18;
- else
- {
- msg_Err( p_access, "illegal polarization %c", *psz_parser );
- free( psz_dup );
- return VLC_EGENERIC;
- }
- var_Set( p_access, "dvb-voltage", val );
- }
- else
- {
- msg_Err( p_access, "unknown option (%s)", psz_parser );
- free( psz_dup );
- return VLC_EGENERIC;
- }
- if ( *psz_parser )
- psz_parser++;
- }
- #undef GET_OPTION_INT
- #undef GET_OPTION_BOOL
- free( psz_dup );
- return VLC_SUCCESS;
- }